How to configure the HHC port on a Neptune E4000 meter

Russ Casadonti

Edited: January 15, 2026 16:32

Summary:

This article explains how to configure the HHC (handheld computer) serial port on a Neptune E4000 meter: enter the Supervisor setup (default password 2000), open COM Ports, select HHC, then set the Baud Rate to 9600 (choose More if needed) and Parity to None. After saving those settings you will return to the COM Ports screen and can exit back to the main menu.

Question:

How do I configure the HHC port on a Neptune E4000 meter?

Environment:

New Mobile Delivery
Neptune E4000

Answer:

Please follow the steps below to configure the printer type on a Neptune E4000 register. You will need to know the Supervisor password to enter into the setup menu.

First navigate to the main menu. You can press Stop/Cancel button several times to back all the way out to the main menu.
On the main menu use the Arrow > button to select Supervisor until it is flashing and press the Start/Enter button.
Enter in the Password by using the Arrow > and Arrow ^ buttons. Press Start/Enter when finished. The factory default password is 2000.
Navigate through the setup menu using the Arrow > button until you get to COM Ports and press the Start/Enter button.
Use the Arrow > button to select HHC and then press the Start/Enter button.
On the first Baud Rate screen use the Arrow > button to select the More option and press the Start/Enter button.
On the second Baud Rate screen use the Arrow > button to select 9600 and then press the Start/Enter button.
On the Parity screen use the Arrow > button to select None and then press the Start/Enter button.
You should be returned to the Com Ports screen and you have successfully setup the printer type on your Neptune E4000. Use the Stop/Cancel button to navigate back to to the main screen.

How to configure the HHC port on a Neptune E4000 meter

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